diff options
Diffstat (limited to 'arch/mips/kernel/cevt-r4k.c')
| -rw-r--r-- | arch/mips/kernel/cevt-r4k.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/mips/kernel/cevt-r4k.c b/arch/mips/kernel/cevt-r4k.c index 82bd2b2..623f0bc 100644 --- a/arch/mips/kernel/cevt-r4k.c +++ b/arch/mips/kernel/cevt-r4k.c @@ -37,6 +37,24 @@ void mips_set_clock_mode(enum clock_event_mode mode, DEFINE_PER_CPU(struct clock_event_device, mips_clockevent_device); int cp0_timer_irq_installed; +/* + * Possibly handle a performance counter interrupt. + * Return true if the timer interrupt should not be checked + */ +static inline int handle_perf_irq(int r2) +{ + /* + * The performance counter overflow interrupt may be shared with the + * timer interrupt (cp0_perfcount_irq < 0). If it is and a + * performance counter has overflowed (perf_irq() == IRQ_HANDLED) + * and we can't reliably determine if a counter interrupt has also + * happened (!r2) then don't check for a timer interrupt. + */ + return (cp0_perfcount_irq < 0) && + perf_irq() == IRQ_HANDLED && + !r2; +} + irqreturn_t c0_compare_interrupt(int irq, void *dev_id) { const int r2 = cpu_has_mips_r2_r6; |
